US9259882B2 - Method for manufacturing metal/composite hybrid wheel for vehicle and metal/composite hybrid wheel manufactured by the same - Google Patents
Method for manufacturing metal/composite hybrid wheel for vehicle and metal/composite hybrid wheel manufactured by the same Download PDFInfo
- Publication number
- US9259882B2 US9259882B2 US12/955,177 US95517710A US9259882B2 US 9259882 B2 US9259882 B2 US 9259882B2 US 95517710 A US95517710 A US 95517710A US 9259882 B2 US9259882 B2 US 9259882B2
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- United States
- Prior art keywords
- mold
- rim
- bonding area
- metal
- outer rim
- Prior art date
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- Expired - Fee Related, expires
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/462—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
- B29C70/76—Moulding on edges or extremities of the preformed part
- B29C70/766—Moulding on edges or extremities of the preformed part on the end part of a tubular article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
- B29C70/76—Moulding on edges or extremities of the preformed part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/78—Moulding material on one side only of the preformed part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2307/00—Use of elements other than metals as reinforcement
- B29K2307/04—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/32—Wheels, pinions, pulleys, castors or rollers, Rims
Definitions
- the present disclosure relates to a method for manufacturing a wheel for a vehicle. More particularly, it relates to a method for manufacturing a metal/composite hybrid wheel for a vehicle by molding an inner rim of a composite material by compression and, at the same time, bonding an outer rim of a metal material to the inner rim to induce compressive residual stress in the bonding area by a difference in thermal expansion coefficient between the outer rim and the inner rim.
- the present methods provide an increase in the adhesive strength of the bonding area and the durability of the wheel.
- the present disclosure further relates to a wheel for a vehicle manufactured by the method, particularly a metal/composite hybrid wheel for a vehicle manufactured by the method.
- VBM vacuum bag molding
- RTM resin transfer molding
- the vacuum bag molding method includes inserting a material, such as prepreg, into a metal mold, mounting an intermediate mold inside the metal mold, applying a Teflon film onto the resulting mold, wrapping the resulting mold using a breeder, placing the resulting mold in a vacuum bag, absorbing air from the vacuum bag using a vacuum pump, and performing an autoclave molding process, to thus produce the product.
- a material such as prepreg
- the process for manufacturing the product using the vacuum bag molding method is complicated, and expensive materials (such as Teflon film, breeder, etc.) are used.
- the vacuum bag molding method is unsuitable for mass production and increases the manufacturing cost.
- the resin transfer molding method includes disposing dry fiber and preform in a lower mold, connecting an upper mold to the lower mold, pressing or clamping the upper and lower molds, injecting a resin mixed with a catalyst into the resulting mold (e.g. using an RTM machine), curing the resin at room temperature or at a high temperature after the resin is impregnated, and removing the mold, to thus produce the product.
- a resin mixed with a catalyst e.g. using an RTM machine
- both the vacuum bag molding method and the resin transfer molding method for manufacturing a hybrid wheel require various adhesion and bonding processes to integrally mold the outer rim of a metal material and the inner rim of a composite material, these manufacturing processes are very complicated.
- the present invention provides a method for manufacturing a wheel, particularly a metal/composite hybrid wheel for a vehicle.
- the present method provides a single process of molding an inner rim of a composite material at a high temperature by compression and, at the same time, bonding an outer rim of a metal material to the inner rim to induce compressive residual stress in the bonding area by a difference in thermal expansion coefficient between the outer rim and the inner rim.
- the present methods provide an increase in the adhesive strength of the bonding area and the durability of the wheel.
- the present invention further provides a wheel manufactured by the present method, particularly a metal/composite hybrid wheel for a vehicle manufactured by the present method.
- the outer rim can be fabricated of a composite material and the inner rim fabricated of a metal material, and the method could be suitably carried out so as to mold and bond the inner and outer rims.
- the present invention provides a method for manufacturing a metal/composite hybrid wheel for a vehicle, the method including: inserting a bonding area of an outer rim into an outer mold to be bonded thereto, the outer rim fabricated of a metal material; inserting or stacking a composite material on the bonding area of the outer rim and an inner circumferential surface of the outer mold; inserting or disposing an intermediate mold within the outer mold and inserting or disposing an inner mold within the intermediate mold to form a mold assembly; and placing the mold assembly into a heating chamber to be heated, wherein the inner rim is compressed and molded and, at the same time, the outer rim and the inner rim are bonded together via the composite material, particularly by the co-cure bonding method with resins (e.g. excessive resins) from the stacked/inserted composite material (e.g. composite prepregs) under a pressure generated by thermal expansion of the intermediate mold.
- resins e.g. excessive resins
- the mold assembly is further cooled to room temperature to induce compressive residual stress in the bonding area of the outer rim and the inner rim.
- the intermediate mold is formed of a rubber material.
- the heating chamber may be heated to a temperature of about 125 to 180° C.
- the composite material includes a volume fraction of carbon fibers of about 30 to 75%.
- the carbon fibers may be in the form of fibers in one direction or in the form of woven fibers.
- the pressure generated by the thermal expansion of the intermediate mold may be controlled by controlling the thickness and/or material of the intermediate mold.
- the bonding area of the outer rim may include a groove portion to increase the adhesive strength with the inner rim.
- the present invention further provides a wheel, preferably a metal/composite hybrid wheel for a vehicle, manufactured by the above-described method.
- vehicle or “vehicular” or other similar term as used herein is inclusive of motor vehicles in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats and ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum).
- a hybrid vehicle is a vehicle that has two or more sources of power, for example both gasoline-powered and electric-powered vehicles.
- FIG. 1 is a diagram showing a conventional vacuum bag molding method for manufacturing a hybrid wheel.
- FIG. 2 is a diagram showing a conventional resin transfer molding method for manufacturing a hybrid wheel.
- FIG. 3 is a diagram showing a method for manufacturing a metal/composite hybrid wheel for a vehicle in accordance with a preferred embodiment of the present invention.
- FIG. 4 is a diagram showing a mold assembly formed during the manufacturing method in accordance with an embodiment of the present invention.
- FIG. 5 is a diagram showing a mold assembly formed during the manufacturing method in accordance with an embodiment of the present invention.
- FIG. 6 is a diagram showing that a high pressure is uniformly applied to a composite material and an outer mold by thermal expansion of an intermediate mold during the manufacturing method in accordance with an embodiment of the present invention.
- FIG. 7 is a diagram showing compressive residual stress induced in a bonding area by a difference in thermal expansion coefficient between a composite material and a metal material during the manufacturing method in accordance with an embodiment of the present invention.
- FIG. 8 is a metal/composite hybrid wheel manufactured by a method in accordance with an embodiment of the present invention.
- mold assembly C heating chamber 10: outer rim 11: groove portion 20: inner rim 100: outer mold 200: intermediate mold 300: inner mold
- the present invention provides a method for manufacturing a wheel, particularly a metal/composite hybrid wheel for a vehicle, by molding an inner rim 20 of a first material by compression and, at the same time, bonding an outer rim 10 of a second material to the inner rim 20 to induce compressive residual stress in the bonding area by a difference in thermal expansion coefficient between the outer rim 10 and the inner rim 20 .
- the first and second materials are selected from composite materials and metal materials, more preferably wherein the first material is a composite material and the second material is a metal material. It is noted that the composite and metal materials are not particularly limited, and any composite materials and metal materials known for use in the manufacture of vehicle wheels can suitably be used in the practice of the present invention.
- the methods of the present invention provide increased the adhesive strength in the bonding area and increased durability of the wheel.
- the present invention further provides a wheel manufactured by the present method, particularly a metal/composite hybrid wheel for a vehicle manufactured by the present method.
- an outer mold 100 preferably fabricated of a metal material, having an outer shape of the wheel on its inner circumferential surface, an intermediate mold 200 having an inner shape of the wheel on its outer circumferential surface, and an inner mold 300 for supporting the intermediate mold 200 during thermal expansion of the intermediate mold 200 and creating a pressure in the intermediate mold 200 are used.
- the outer rim 10 of a metal material is mounted to the outer mold 100 in such a manner that a cylindrical bonding area, to which the inner rim 20 is bonded, is closely inserted into the inside of the outer mold 100 and fixed thereto (shown in greater detail, for example, in FIG. 4 ).
- a composite material for molding the inner rim 20 is inserted into the outer mold 100 and is preferably uniformly stacked on the overall bonding area of the outer rim 10 and the inner circumferential surface of the outer mold 100 (see also FIG. 4 ) without a carrier.
- the composite material can be directly laminated on the overall bonding area of the outer rim 10 and the inner circumferential surface of the outer mold 100 without an intermediate layer, such as a bonding layer.
- the intermediate mold 200 is inserted into the inside of the outer mold 100 and is preferably is fixed to prevent movement, and the inner mold 300 is inserted into the inside of the intermediate mold 200 such that the intermediate mold 200 is in indirect contact with the outer mold 100 , thereby forming a metal assembly A.
- the metal assembly A is placed in a heating chamber C, which is preheated to a temperature at which the composite material is molded into a desired shape (for example, preferred temperatures can include those ranging from about 125 to 180° C.), so as to be heated.
- the composite material contains a thermosetting resin, which is increasingly crosslinked and cured by heat and, thus, is not transformed even when a large force is applied.
- the intermediate mold 200 is formed of a material, such as a rubber material, having a high thermal expansion coefficient so as to move in a radius direction by thermal expansion (e.g. see FIG. 6 ).
- the composite material is thermally cured, and the intermediate mold 200 is heated by the heat and thermally expanded in a radius direction.
- the composite material is molded by placing the mold assembly A in the heating chamber C to be heated, and the intermediate mold 200 compresses the composite material into the inner rim shape by pressure created by the thermal expansion.
- the thermal expansion of the rubber intermediate mold 200 applies a uniform and high pressure to the composite material and the outer mold 100 as shown in FIG. 6 , and this pressure, which is higher than the molding pressure of a typical composite material, compresses the composite material and molds the bonding area (where the outer rim and the inner rim are bonded together) of the metal/composite hybrid wheel.
- the adhesive strength of the bonding area with the inner rim of the composite material can be further increased.
- the manufacturing method of the present invention beneficially does not require adhesion and bonding processes to integrate the outer rim 10 of the metal material and the inner rim 20 of the composite material (e.g. after a process wherein the inner rim 20 is molded separately) and, thus, the present methods allow for the manufacture of a metal/composite hybrid wheel by a simplified molding process.
- the compressive residual stress is induced in the bonding area of the outer rim 10 and the inner rim 20 by a difference in thermal expansion coefficient between the metal material and the composite material in a “hoop direction”, i.e., in the circumferential direction of the cylindrical bonding area, and thus the adhesive strength of the bonding area where the outer rim 10 and the inner rim 20 are bonded together is increased.
- the compressive residual stress inside the hybrid wheel can increase the structural fatigue life of the wheel, thereby increasing the durability of hybrid wheels of the present invention.
- the manufacturing method of the present invention further includes removing the heated mold assembly A from the heating chamber C and cooling the mold assembly A to a temperature, for example room temperature, that induces the compressive residual stress.
- room temperature means a temperature of about 20 to 30° C.
- the curing cycle of the wheel is as follows: the mold assembly A which has been cooled to a temperature, such as room temperature (e.g., at 25° C.), is heated to an increased temperature (for example, about 125 to 180° C.), at which the composite material is molded; and is then cooled, for example to room temperature, such that a temperature difference of more than about 100° C. occurs during the cooling process.
- a temperature such as room temperature (e.g., at 25° C.)
- an increased temperature for example, about 125 to 180° C.
- the manufacturing method of the present invention it is possible to induce the compressive residual stress as shown in FIG. 7 in the bonding area of the metal-composite hybrid wheel by a difference between the molding temperature of the composite material and the cooling temperature (e.g. room temperature) by cooling the heated mold assembly A to the cooling temperature (e.g. room temperature).
- the cooling temperature e.g. room temperature
- the adhesive strength between the outer rim 10 and the inner rim 20 is increased.
- the internal pressure P generated by the compressive residual stress induced in the bonding area of the metal/composite hybrid wheel can be calculated by the following formula 1:
- ⁇ ⁇ represents the strain in the hoop direction and ( ⁇ ⁇ ) C represents the strain in the hoop direction (i.e. circumferential direction) of the composite material.
- the composite material has a volume fraction of carbon fibers of about 30 to 75%.
- the composite material contains carbon fibers with a volume fraction of about 30 to 75% and polymer resin with a volume fraction of about 25 to 70%.
- the carbon fibers are in the form of fibers in one direction or in the form of woven fibers, and the polymer resin is a thermosetting resin such as epoxy, polyester, etc.
- the hardness and strength of the composite material can vary according to the type of the carbon fiber, and thus it is possible to control the residual thermal stress induced in the bonding area of the aluminum and composite material by stacking or inserting the composite material at an appropriate angle with respect to the hoop direction (i.e. circumferential direction) of the wheel. It has been found that if the carbon fibers are stacked in the hoop direction, the residual thermal stress induced in the bonding area of the aluminum outer rim 10 can be maximized, and thus it is preferable that the carbon fibers be stacked in the hoop direction. In embodiments wherein a woven carbon fiber composite material is used, it is preferable that the carbon fibers in the longitudinal direction be stacked in the hoop direction of the wheel.
- Metal materials used in fabricating rims of the invention can be any metal materials conventionally used and can be selected from, for example, aluminum, magnesium, titanium, etc.
- the composite material can also be any such materials conventionally used, and preferably the inner rim 20 is molded using a composite material containing a fiber-reinforced composite material as mentioned above.
- one or more grooves such as a concave groove portion 11 as shown in FIG. 4 , is formed in the bonding area of the outer rim 10 . Therefore, when the composite material is molded by compression and, at the same time, when the inner rim 20 and the outer rim 10 are bonded together, the adhesive strength of the bonding area of the hybrid wheel can be increased and the torque in the hoop direction can be more smoothly transmitted.
- a portion of the composite material for molding the bonding area of the inner rim 20 is inserted into the grooves/groove portion 11 and is cured, thereby increasing the adhesive strength of the bonding area of the hybrid wheel.
- the metal/composite hybrid wheel of the present invention when the metal/composite hybrid wheel of the present invention is manufactured by molding and bonding the outer rim 10 and the inner rim 20 , which are formed of different materials, by co-cure bonding in the above-described manner, the metal/composite hybrid wheel may be composed of an outer rim 10 of a composite material and an inner rim 20 of a metal material.
- the inner rim 20 of the metal material can be stacked on the outer circumference of the bonding area of the outer rim 10 such that at least a portion of the metal material of the inner rim 20 is located outside and at least a portion of the composite material of the outer rim 10 is located inside, and thus it is possible to induce compressive residual stress in the bonding area of the final molded product.
- the outer rim of a first material e.g. metal material
- the inner rim of a second material e.g. composite material
- the product manufactured by the method of the present invention has excellent mechanical properties.
- the molding of the inner rim of a composite material is made at the same time with the molding of the bonding area of the outer rim and the inner rim, and thus it is possible to simplify the manufacturing process and facilitate the mass production.
- the temperature is reduced (e.g.
Abstract
Description
A: mold assembly | C: heating chamber | ||
10: outer rim | 11: groove portion | ||
20: inner rim | 100: outer mold | ||
200: intermediate mold | 300: inner mold | ||
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2010-0079994 | 2010-08-18 | ||
KR1020100079994A KR101198625B1 (en) | 2010-08-18 | 2010-08-18 | Manufacturing method of the metal composite hybrid wheel for vehicles |
Publications (2)
Publication Number | Publication Date |
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US20120043014A1 US20120043014A1 (en) | 2012-02-23 |
US9259882B2 true US9259882B2 (en) | 2016-02-16 |
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US12/955,177 Expired - Fee Related US9259882B2 (en) | 2010-08-18 | 2010-11-29 | Method for manufacturing metal/composite hybrid wheel for vehicle and metal/composite hybrid wheel manufactured by the same |
Country Status (2)
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US (1) | US9259882B2 (en) |
KR (1) | KR101198625B1 (en) |
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GB2485334B (en) | 2010-10-11 | 2014-08-06 | Gkn Aerospace Services Ltd | Structure |
WO2015066546A1 (en) | 2013-10-31 | 2015-05-07 | Rodman William L | Composite structures having embedded mechanical features |
US20150130261A1 (en) * | 2013-11-08 | 2015-05-14 | Patrick Warren | Method of Designing and Producing Carbon Fiber Wheels |
KR20160045192A (en) | 2014-10-16 | 2016-04-27 | (주)대한솔루션 | Noise-reducing wheel for vehicle |
KR101664918B1 (en) | 2014-11-19 | 2016-10-11 | 주식회사 효성 | Polyketone vehicle wheel rim |
US9969209B2 (en) | 2015-05-26 | 2018-05-15 | Joshua Quiroz | Molded wheel device |
JP2019508308A (en) | 2016-02-02 | 2019-03-28 | スピアリア インダストリーズ インターナショナル インコーポレイテッド | Hybrid composite wheel |
DE112018004943T5 (en) | 2017-09-08 | 2020-07-09 | Superior Industries International, Inc. | Hybrid wheel assembly with mounting pin |
DE102018202231A1 (en) | 2018-02-14 | 2019-08-14 | Ford Global Technologies, Llc | Vehicle wheel and method for its manufacture |
KR102131100B1 (en) * | 2019-04-23 | 2020-07-07 | 주식회사 넥스컴스 | Manufacturing Method of Automotive Parts with High-Strength High-Strength Skeleton |
KR20200127486A (en) * | 2019-05-02 | 2020-11-11 | 현대자동차주식회사 | Integrated structure and method of different kinds materials |
CN110370686B (en) * | 2019-08-13 | 2021-03-12 | 核工业第八研究所 | Manufacturing process of double-composite material reinforced ring |
KR102176913B1 (en) * | 2020-01-21 | 2020-11-10 | 도레이첨단소재 주식회사 | Method for manufacturing vehicle wheel using fiber reinforced composite material, vehicle wheel using fiber reinforced composite material and vehicle wheel mold |
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Also Published As
Publication number | Publication date |
---|---|
KR20120021824A (en) | 2012-03-09 |
KR101198625B1 (en) | 2012-11-07 |
US20120043014A1 (en) | 2012-02-23 |
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